Zinc res ist-mordant



NliED I States I I XE... Parent WILLIAM T. \VHITEHEAD, OF MAGOG, CANADA,ASSIGNOR OF ONE-HALF TO HENRY D. DUPEE, OF BOSTON, MASSACHUSETTS.

ZINC RESlST MORDANT.

SPECIFICATION forming part of Letters Patent No.499,696,{dated June 13,1893.

Application filed February 21, 1893. Serial No. 463,249. (ltlospecimens.)

To aZZ whom; it may concern:

Be it known that LWiLLIAM T. WHITEHEAD, a subject of the Queen of GreatBritain, residing at Magog, in the Province of Quebec, Dominion ofCanada, have invented an linprovement in Resist-Mordants for Plain-DyedFabrics, of which the following is a specificadifferent color, and inaccordance therewith i 5 my invention consists in printing a pattern orfigure on the cloth in a resist-niorciant containing zinc as theessential or active element and thereafter dyeing the cloth a plaincolor, substantially as will be described.

In the practice of my invention, i take cotton, wool or silk fabricprepared for printing in any usual or Well known Way, and print thereonthe desired pattern or figure in a resist-mordant to be hereinafterparticularly described, dry the usual way-and steam as required. I thendye the cloth a plain color in a jig, dye-beck, padding machine, or inany of the Well known ways,and then develop and finish in the usualmanner. The cloth so 0 treated will then present a plain colored groundwith the pattern or figure displayed thereon in the same color,but of ashade contrasting with the ground.

In the course of my experiments I have 5 discovered that by using arcsist-inordant containing zinc as the essential or active elementthereof and printing the pattern or figure in such a resistniordantmixed with a proper thickener and thereafter dyeing the fabric a 40plain color and finishing, the zinc in theorize ture will act toinordanta portion of the plain coloron the parts of the fabric coveredby the resist-mordant, at the same time resisting some of the color onsuch portions, and the .5 result is the figured effect in two. differentshades of the same color. The pattern or fig ure in this instance willbe lighter than the ground Work. If a deep, dark shade of color isdesired in the pattcrn,then that particular 50.00101 will be mixed witha resist-inordant proparatory to printing therewith, and when the clothhas been plain dyed the same color and finished, the pattern. or figureappears in a shade darker than the ground. In this i. stance the zincappears to act as a niordant for the color carried by the mixture fixingit in the cloth in the desired pattern, While it also acts to resist aportionof the plain color in the subsequent dyein i I prepare the 1xsist-mordant mixture by taking about six pounds more or less of metalliczinc'in a finely divided state, or a zinc compound, such as zinc oxide,hydrate, or carbonate, to supply the zinc, which is the essential oractive element, and it with one-half a gallon of water to which I onegallon of starch paste (one and one halt pounds per gallon) and one-halfgallon of albuinen solution (six pounds per gallon) or any other usual.thickening preparation such as gum tragacantll or guin arahic. Theseingredients are thoroughly mixed and the cloth is printed therewith. Forthe best results when metallic zinc is used it should be ground. to anirnpalpable powder and mixed with the y Water.

t the pattern orfigure is to he or" a darker shade than the ground I mixcoal-tar tract or pigment color with tl'leforcgoinginirture in theproper proportion and quantity, So the same Varying according to thedepth olf shade desired, the character of the pattern, particnlarnatureof the color itself, etc. can also produce veryhcautiful effects loyrnyprocess by making the color in the resist- 8 mordant and the color ofthe "round different, in which case the finished oth will have thepattern or ligure in one color and. the ground in another, and patternand ground may or may not contrast in shade'as desired. c

in another concurrently pending application (Serial No. 458,530, tiledJanuary 16, 1893), the use of zinc compounds to supplythe essential oractive element, is described and specifically claimed. 1

i do not wish to restrict niyselt' to the exact proportion of thevarious ingredients com posing the mixture described, as the same can bevaried without departing from the scope of my invention, the gist ofwhich consists in producing a pattern or figure by the employment of aresist-mordant containing zinc as its essential or active element.

I claim-- 1 The process of producing cloth havinga pattern or figurethereon of a shade con trasting with the ground, which consists inprinting the pattern or figure on the cloth in a resist-mordantcontaining zinc as the essential or active element, andthereafter-dyeing the cloth a plain color, substantially as de--scribed. W

2. The proccssof producing cloth having a pattern or figure thereon of ashade darker than the ground color, which consists in printing thepattern or figure on the cloth in a re sist-1nordant containing zinc asthe essential or active element, and a color, and thereafter plaindyeing the cloth in the same color, suhstantially as described.

3. The process of producing clothhavinga pattern or figure thereon of acolor contrasting with the ground, which consists in printing thepattern or figure on the cloth in a resist-mordant containing zinc asthe essential or active element,and a color, and thereafter dyeing thecloth in a plain contrasting color, suhstantiallyas described.

In testimony whereof I have signed my name to this specification in thepresence 0t 30 .two subscribing witnesses.

WILLIAM 'I. \VIIITEHEAD.

W itnesses:

J AS. DOLPHIN, IIUGH JAMIESON:

